There is some strategy I would suggest to you.
1. Keep eye on your competitor strategy. think how they are ranking on particular keywords.
2. check technical issue. if there so please solve it.
3. Page speed must be good. Check if page speed slow for both mobile and desktop then you need to improve it.
4. if you have e-commerce website so use structure data.
5. Check Broken links. if there so please solve it.
6. Monitor google webmaster and analytics daily.

Ranking for high volume keywords is no different than ranking for low volume keywords. Write long, detailed and informative website copy and content. Do this for each page of your businessís website, be sure that you are answering questions that potential customers have clearly and succinctly.